I have no great experience on SMP, but the only good that I see is about Diamond protection stone.
But, to give 20$ for that, I think it is too much. You can buy 40+ 11x11x11 stones with that money.
About the idea of having 1pound=5k $ of game, I believe its too much.
I like though, about the label=1$,2$ I could buy one. I like that.
1) A mob spawn for 25$ would be good. I dont know though how many will buy it.
And I just want to mention something. If a server become for donators, then it loses its sense. Just a 10-15 things to donate I believe far than enough.
